With all the Zoostorms posted, if you wanted a machine to act as an multi purpose server, personally id go with this (what do others think?) -
Twin (2) x Xeon Quad Core L5410 CPUs
8 x 2.33GHz total processing power
16GB RAM and 1TB (1,000GB) SATA hard drive
Upgradeable to massive 128GB RAM -16 DIMM slots
and 3 x 4TB (12,000GB) SATA HDD - 3 Hot plug caddies
Intel S5400SF motherboard & Delta TDPS-600CBC PSU
Shame im having a cash flow problem, id be tempted myself.
Slightly related - Don't supose, anyone knows anyone who buys PC Parts, in bulk round NW Area, as id rather sell them all and get something like this.